/
player.go
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/
player.go
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/*
* Copyright 2019 Insolar Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package messagebus
import (
"context"
"github.com/insolar/insolar/core"
)
// Player is a MessageBus wrapper that replays replies from provided tape. The tape can be created and by Recorder
// and transferred to player.
type player struct {
sender
tape tape
scheme core.PlatformCryptographyScheme
pulseStorage core.PulseStorage
}
// newPlayer creates player instance. It will replay replies from provided tape.
func newPlayer(s sender, tape tape, scheme core.PlatformCryptographyScheme, pulseStorage core.PulseStorage) *player {
return &player{
sender: s,
tape: tape,
scheme: scheme,
pulseStorage: pulseStorage,
}
}
// Send wraps MessageBus Send to reply replies from the tape. If reply for this message is not on the tape, an error
// will be returned.
func (p *player) Send(ctx context.Context, msg core.Message, ops *core.MessageSendOptions) (core.Reply, error) {
currentPulse, err := p.pulseStorage.Current(ctx)
if err != nil {
return nil, err
}
parcel, err := p.CreateParcel(ctx, msg, ops.Safe().Token, *currentPulse)
if err != nil {
return nil, err
}
id := GetMessageHash(p.scheme, parcel)
item, err := p.tape.Get(ctx, id)
if err != nil {
return nil, err
}
return item.Reply, item.Error
}
func (p *player) OnPulse(context.Context, core.Pulse) error {
panic("This method must not be called")
}